Chusetts



(No Maciel.)

F. N. BTHRIDGE n C. W.l B. FULLER. HEEL TRIMMING MACHINE.

No. mgoz. Patented om.. 1, 1889..

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UNITED STATES FRANK N. ETHRIDGE, OF BOSTON, AND CHARLES W. B. FULLER, OF MALDEN, ASSIGNORS TO THE ACME HEEL FR-IMMER COMPANY, OF BOSTON, MASSA- CHUSETTS.

HEEL-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 412,026, dated October 1, 1889.

Application filed May 25,1889. Serial No. 312,060. (No model.)

To' @ZZ whom it may concern: able toward and from the part -i on a rotary Beit known that We,'FRANK N. ETHRIDGE,of stud 10, which is fitted to rotate in the sleeve 5o Bostoinin the county-'of SuftollnandOHARLEs G, and is provided with a spiral shoulder XV. B. FULLER, ot' Malden, in the county of or cain 9, which bears against a similarly- 5 Middlesex, both in the State of Massachuformed shoulder 8 on a hub or sleeve formed setts, have invented certain new and useful on the part 5. By rotating the stud l Improvements in Heel-Trimming Machines, (Which may be done by applying a Wrench to 55 of which the following is a specification. its squared outer end) the movable part This invention relates to heel-trimming may be forced away from the fixed part 4,

Io machines employing a rotary cutter-head,a the two parts being thus expanded in the top-lift support or rest located at one end of grooves 3 of4 the knives and caused to ent-he cutter-head and formed to support both gage the dovetail edge of said grooves, the 6o the tread and the edge of the top littwhen parts t 5 being provided with dovetail shoulthe heel is presented to the cutter, a counterders on their outer ends fitting the edges of guard arranged to cover the end of the cuttersaid grooves. (See Figs. 1 and head opposite the top-lift. rest, and provided To release the knives it is only necessary with means whereby it may be adjusted and to rotate the stud 10 in the opposite direc- 65 iixed in different positions to accommodate tion, as Will be' readily seen. The knives are cutters ot different sizes, and a rand-trimmer supported and prevented from moving backlocated on another shaft and formed to trim Wardly on the holder fl by stops or prothe rand and heel-seat portions ot the heel jee-tions 12 12, formed on a sleeve 13, tted after the main trimming operation. to rotate on the sleeve C, said stop being ar- 7o y The invention consists in certain improveranged to bear against the rear ends of the ments, hereinafter described, relating to the blades 2, as shown in Fig. 5. The sleeve 13 cutter-head. may be turned to bring the stops 12 to a Of the accompanying drawings, forming a proper adjustment, and is secured after bepart of this specitication, Figure 1 represents ing adjusted by a nut 14, which is screwed 75 a side view of our improved cutter-head. upon a threaded portion of the sleeve 6, and Fig. 2 represents alongitudinal section ot' the 4when .turned in one direction holds the'inner 3o saine. Figs. 3 and et represent perspective end of the sleeve 13 firmly against the part/l views of the movable part of the holder and of the blade-holder, so that said sleeve cannot the adjusting devices or cam. Fig. 5 repreturn on the sleeve 6. 8o sents a section on line a: Fig. 1. We claim- The same letters of reference indicate the 1. The cutter-head composed of the knives saine parts in all the figures. having grooved backs, the holder engaged In the drawings, a represents the cutter- With said grooves and composed of the part head, which is mounted on a shaft l), to @affixed to the shaft, and the part having S5 which power is applied by a driving-belt, the the cam-shaped hub or collar 8, and the stud shaft l) being journaied in suitable bearings 10, having the cam-shaped shoulder formed i 4o on the frame of the machine. to engage said cam-shaped hub or collar, as

The cutter-head a is composed of blades set fort-h. 2 2, in the curved inner surfaces of which 2. The combination of the knives having 9o are dovetail grooves 3, arranged at right angrooved backs, the holder engaged with said gies to the axis of rotation of the cutter-head, grooves and composed of the part et, aixed and a holder 'for said blades made in two to the sha-ft and provided with the screwparts -l 5, one of which i is formed on a threaded sleeve (3 and the adjustable part sleeve G, which is rigidly attached to the 5, the adjustable sleeve 13, movable on the shaft Zi by a sereW7,\vhile the otheris movsleeve 0 and having stops 12 for the rear ends of said hblades, and a locking-nut 14, twosubscribingwitnesses, this22dday of May, engaged with the threaded port-ion of t-he A. D. 1889. sleeve 6, whereby said sleeve 13 may-be se- FRANK N. ETHRIDGE. cured at any point to which it may be ad- 5 justed, as set forth.

In testimony whereof We have signed our names to this specification, in lche presence of CHARLES 1V. B. FULLER. Witnesses:

C. F. BROWN, A. D. HARRISON. 

